| | RF Cascade Workbook© 2005 User’s Guide | | Chapter 1, 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 13 | Version 1.11
by Kirt Blattenberger
RF Cafe Website
(www.rfcafe.com) | Chapter 4 | 4 Device Specification | Each device is specified similar to what is shown in Table 3. Figure 5 identifies each of the special features in the worksheet, so please review it carefully before proceeding. Note that device parameter input cells from RF Cascade Workbook 2003 may be copied and pasted into this version, provided that care is taken to not paste over formula cells (white backgrounds). Noise Bandwidth values are now entered on the “Filter-Mixer” worksheet rather than on the “Inband” worksheet. All cell input data is validated for correctness. | 
| Figure 5 Device Specification Input Area | A description of and allowable input range for each device parameter is given in Table 3. Limits have been set using the “Data->Validation” menu selection (Figure 6), and may be changed by the user. Keep in mind if you decide to increase the limits on dB values (although it is hard to imagine why the need would arise) that the VBA functions use double precision numbers with a maximum value of around 10308, so values like NF, IP2 and IP3 that need to be converted from decibels to linear numbers during calculation could exceed the limit and cause an error to display in the cells. Cell contents are validated using the built in Excel data validation feature (use Validation… menu to modify). | 
| Figure 6 Data Validation Menu Access | Parameter | Description | Range | Tolerance | Units | Designation | Descriptive name | - | - | - | Gain | Linear power Gain | -1000 to +1000 | -1000 to +1000 | dB | NF | Noise Figure | 0 to +1000 | 0 to +1000 | dB | I/O | Input/Output parameter reference – applies only to IP2 and IP3. Conversion of the input value is not made automatically by switching between “I” and “O,” so entering +20 dBm as the IIP3 (with an “I” in the “I/O” cell) and then changing to an “O” will result in the +20 dBm being interpreted as the OIP3. Make the conversions as follows:OIP2(3) = IIP2(3) + GainIIP2(3) = OIP2(3) - Gain | “i” or “I” for
input
“o” or “O” for
output | - | - | IP2 | 2nd-Order Intercept Point | -1000 to +1000 | -1000 to +1000 | dBm | IP3 | 3rd-Order Intercept Point | -1000 to +1000 | -1000 to +1000 | dBm | P[sat] | Saturated Power | -1000 to +1000 | -1000 to +1000 | dBm | !!!
(this is not an input) | Displays alert for the following conditions:
N = A negative value is entered in the Gain cell, but the NF
is not equal to the absolute value of the Gain.
S = The input power plus linear Gain results in an output
power greater than the saturated power for the device.
P[sig]max power is used for testing worst case.
T = Tolerance exceeded on any of the following |
> | ±Gain÷2,
> | ±NF÷2 |,
> | ±IP2÷2 |,
> | ±IP3÷2 | | - | - | Input Return Loss | RL =  | 10-3 to 50 | - | dB | Output Return Loss | RL = | 10-3 to 50 | - | dB |
| Table 3 Device Input Parameters | Chapter 1, 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 13 | Version 1.11
by Kirt Blattenberger
RF Cafe Website
(www.rfcafe.com) | Chapter 4 |
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